Crumbly peanut cookies with rich, nutty flavor are a beloved Chinese New Year treat. A family recipe with fresh, roasted peanut aroma.
Preheat oven to 340°F (170°C) and line a baking sheet with parchment paper for even heat distribution.
Pulse roasted peanuts in a food processor until finely ground, avoiding over-processing to prevent releasing excessive oil.
In a mixing bowl, combine ground peanuts, all-purpose flour, confectioners’ sugar, salt, and baking powder; mix thoroughly to distribute leavening evenly.
Pour in vegetable oil and mix until the dough comes together. Avoid overmixing to maintain a crumbly texture.
Scoop about 1 tablespoon of dough per cookie, roll into a ball, and gently flatten. Arrange on prepared baking sheet with space between each cookie.
Brush tops with egg yolk for gloss, then bake on the middle rack for 16–18 minutes until edges are light golden, taking care not to overbake.
Cool cookies completely on the sheet before moving, as they will be delicate while warm and firm up upon cooling.